<template>
  <div>
      <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
        <!-- 添加角色按钮区 -->
        <el-row>
            <el-col>
                <el-button type="primary">添加角色</el-button>
            </el-col>
        </el-row>
        <el-table :data="rolelist" border stripe>
            <!-- 展开列 -->
            <el-table-column type="expand">
                <template #default="scope">
                    <el-row :class="['bdbottom',index1 === 0?'bdtop':'','vcenter']" v-for="(item1,index1) in scope.row.children" :key="item1.id">
                        <!-- 渲染一级权限 -->
                        <el-col :span="5">
                            <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                            <i class="el-icon-caret-right"></i>
                        </el-col>
                        <!-- 渲染二级和三级权限 -->
                        <el-col :span="19">
                            <!-- 通过for循环嵌套渲染二级权限 -->
                            <el-row :class="[index2 === 0?'':'bdtop','vcenter']" v-for="(item2,index2) in item1.children" :key="item2.id">
                                <el-col :span="6">
                                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                    <i class="el-icon-caret-right"></i>
                                </el-col>
                                <el-col :span="18">
                                    <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                                        {{item3.authName}}
                                    </el-tag>
                                </el-col>
                            </el-row>
                        </el-col>
                    </el-row>
                </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
            <el-table-column label="操作" min-width="300px">
                <template #default="scope">
                    <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                    <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                    <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                </template>
            </el-table-column>
        </el-table>
    </el-card>
    <!-- 分配权限的对话框 -->
    <el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="50%"
  @close="setRightDialogClosed">
  <!-- 树形控件 -->
  <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
  <template #footer>
      <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </template>
</el-dialog>

  </div>
</template>

<script>
export default {
  data () {
    return {
      // 所有角色的列表数据
      rolelist: [],
      // 是否显示分配权限的对话框
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    getRolesList () {
      this.$http.get('roles').then(res => {
        if (res.meta.status !== 200) {
          return this.$message.error('获取角色列表失败')
        }
        this.rolelist = res.data
        console.log(this.rolelist)
      })
    },
    // 根据id删除对应的权限
    removeRightById (role, rightId) {
      // 弹框提示用户是否要删除
      this.$confirm('是否删除?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        this.$http.delete(`roles/${role.id}/rights/${rightId}`).then(res => {
          if (res.meta.status !== 200) {
            return this.$message.error('删除失败')
          }
          role.children = res.data
          this.$message.success('删除成功')
        })
      }).catch(() => {
        this.$message.info('已取消删除')
      })
    },
    // 展示分配权限的对话框
    showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限的数据
      this.$http.get('rights/tree').then(res => {
        if (res.meta.status !== 200) {
          return this.$message.error('获取权限数据失败')
        }
        this.rightslist = res.data
        // 递归获取三级节点的id
        this.getLeafKeys(role, this.defKeys)
        this.setRightDialogVisible = true
      })
    },
    // 通过递归的形式获取角色下所有三级权限的id
    getLeafKeys (node, arr) {
      // 如果当前node节点不包含children属性
      if (!node.children) { return arr.push(node.id) }
      node.children.forEach(el => {
        this.getLeafKeys(el, arr)
      })
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    allotRights () {
      const keys = [...this.$refs.treeRef.getHalfCheckedKeys(), ...this.$refs.treeRef.getCheckedKeys()]
      console.log(keys)
      const idStr = keys.join(',')
      this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr }).then(res => {
        // console.log(res)
        if (res.meta.status !== 200) {
          return this.$message.error('分配权限失败')
        }
        this.$message.success('分配权限成功')
        this.getRolesList()
        this.setRightDialogVisible = false
      })
    }
  }
}
</script>

<style scoped lang="less">
.el-tag{
    margin:7px;
}
.bdtop{
    border-top:1px solid #eee
}
.bdbottom{
    border-bottom:1px solid #eee
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>
